'Every single day this base is at war. These kids are not playing video games out of their mothers' basements'. The pilots sit in dimly lit, air-conditioned trailers, each staring at glowing video and data screens and toggling a joystick that controls an armed drone flying somewhere in the world.
In this experiment, you will measure the amount of energy available for use from three types of nuts, a plant product. This process of measuring the energy stored in food is known as calorimetry.
Using the International System of Units, researchers measure energy in joules (J) or in its multiples; the kilojoule (kJ) is most often used for food-related quantities. An older metric system unit of energy, still widely used in food-related contexts, is the calorie; more precisely, the food calorie, large calorie or kilocalorie (kcal or Cal), equal to 4.184 kilojoules. (Contrast the small calorie (cal), equal to 1 / 1000 of a food calorie, that is often used in chemistry and in physics.)